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Cheap flights from Helena to London from $371

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to London departing on 4/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Helena to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:15 am - 10:50 am
HLN
-
LHR
22h 35m
2 stops
United Airlines Logo
11:35 am - 9:25 pm
LHR
-
HLN
15h 50m
1 stop
$668United Airlines
Thu, Mar 19 - Thu, Mar 26
United Airlines Logo
2:25 pm - 6:30 am
HLN
-
LHR
33h 05m
2 stops
United Airlines Logo
7:25 am - 9:33 pm
LHR
-
HLN
21h 08m
2 stops
$703United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:25 pm - 6:30 am
HLN
-
LHR
33h 05m
2 stops
United Airlines Logo
7:25 am - 9:33 pm
LHR
-
HLN
21h 08m
2 stops
$705United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:25 pm - 10:00 am
HLN
-
LHR
36h 35m
2 stops
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$732United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:25 pm - 10:00 am
HLN
-
LHR
36h 35m
2 stops
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$734United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:30 pm - 9:40 am
HLN
-
LHR
13h 10m
1 stop
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$749United Airlines
Tue, Mar 24 - Tue, Mar 31
KLM Logo
1:02 pm - 10:30 am
HLN
-
LHR
15h 28m
2 stops
KLM Logo
9:55 am - 10:30 pm
LHR
-
HLN
19h 35m
2 stops
$753KLM
Tue, Mar 24 - Tue, Mar 31
United Airlines Logo
2:30 pm - 9:40 am
HLN
-
LHR
13h 10m
1 stop
United Airlines Logo
11:35 am - 9:25 pm
LHR
-
HLN
15h 50m
1 stop
$764United Airlines
Thu, Mar 19 - Thu, Mar 26
United Airlines Logo
2:25 pm - 12:20 pm
HLN
-
LHR
14h 55m
1 stop
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$779United Airlines
Sat, Apr 4 - Sat, Apr 18
United Airlines Logo
2:25 pm - 12:20 pm
HLN
-
LHR
14h 55m
1 stop
United Airlines Logo
2:50 pm - 9:33 pm
LHR
-
HLN
13h 43m
1 stop
$780United Airlines
Sat, Apr 4 - Sat, Apr 18

United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets
United Airlines
Mar 19
HLN6:15 amHelena
22h 35m
2 stops
LHR10:50 amLondon Heathrow
Mar 26
LHR11:35 amLondon Heathrow
15h 50m
1 stop
HLN9:25 pmHelena
$668
United Airlines
Apr 4
HLN2:25 pmHelena
33h 05m
2 stops
LHR6:30 amLondon Heathrow
Apr 18
LHR7:25 amLondon Heathrow
21h 08m
2 stops
HLN9:33 pmHelena
$703
United Airlines
Apr 4
HLN2:25 pmHelena
33h 05m
2 stops
LHR6:30 amLondon Heathrow
Apr 18
LHR7:25 amLondon Heathrow
21h 08m
2 stops
HLN9:33 pmHelena
$705

momondo Fare Finder

 
Customize your flight search to find flights from Helena to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Helena to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HelenaLondon

HLN - LHR

HLNLHR

Helena

Thu 3/19

6:15 am-10:50 am

2 stops22h 35m

London Heathrow

Thu 3/26

11:35 am-9:25 pm

1 stop15h 50m

$668

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-6:30 am

2 stops33h 05m

London Heathrow

Sat 4/18

7:25 am-9:33 pm

2 stops21h 08m

$703

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-6:30 am

2 stops33h 05m

London Heathrow

Sat 4/18

7:25 am-9:33 pm

2 stops21h 08m

$705

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-10:00 am

2 stops36h 35m

London Heathrow

Sat 4/18

2:50 pm-9:33 pm

1 stop13h 43m

$732

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-10:00 am

2 stops36h 35m

London Heathrow

Sat 4/18

2:50 pm-9:33 pm

1 stop13h 43m

$734

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 3/24

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Tue 3/31

2:50 pm-9:33 pm

1 stop13h 43m

$749

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 3/24

1:02 pm-10:30 am

2 stops15h 28m

London Heathrow

Tue 3/31

9:55 am-10:30 pm

2 stops19h 35m

$753

HelenaLondon

HLN - LHR

HLNLHR

Helena

Thu 3/19

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Thu 3/26

11:35 am-9:25 pm

1 stop15h 50m

$764

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-12:20 pm

1 stop14h 55m

London Heathrow

Sat 4/18

2:50 pm-9:33 pm

1 stop13h 43m

$779

HelenaLondon

HLN - LHR

HLNLHR

Helena

Sat 4/4

2:25 pm-12:20 pm

1 stop14h 55m

London Heathrow

Sat 4/18

2:50 pm-9:33 pm

1 stop13h 43m

$780

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Helena to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Helena to London?

United Airlines, Delta, and KLM are the most popular carriers operating from Helena to London

When to book flights from Helena to London

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Helena to London (HLN to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to London

Fastest flight time

18h 25m

Direct flights

None
The fastest flight from Helena to London takes 18h 25m
There are no direct flights from Helena to London. There are no popular flight routes from Helena to London.
Search flight deals

  • How far is Helena to London by plane?

    Helena and London are 4547.6 mi apart from one another. In terms of flight time, this usually takes a little over 18h 25m.

  • When did momondo last update prices for flights from Helena Airport to London?

    Prices for flights from Helena Airport to London were last updated today.

  • How old do you have to be to fly from Helena Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Helena to London?

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Slough
Guildford
Crawley
Wembley
Dartford
Hayes
Croydon
Brentwood
Harrow
Watford
Cobham
Folkestone
Romford
Stansted
Richmond

Why use momondo?

Why should I use momondo to find a flight deal from Helena to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Helena to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Helena to London with flexible booking policies on momondo?

Yes. All flights to London from Helena on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Helena to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to London.

I’m not ready to book a flight from Helena to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Helena and alert you when they change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport